Hoist



Nov. 4, 1941. F. A. JI MERSON ETAL 2,261,382

' HOIST Filed May 12, 1938 2 Sheets-Sheet 1 H l S ATTORNEY.

I Nov. 4, 1941. F. A. JIMERISON E Au 2,261,382

HOIST Filed May 12, 1938 2 Sheets-Sheet 2 INVENTOR 7 0119A (I'm arsonana'bamld C1993 lets" H05 ATTORNEY,

Patented Nov. 4, 19 41 nors'r r Francis. A. Jimerson and Harold (J.Reynolds,

Athens, Pa.,' assignors to Ingersoll-Rand Company, Jersey City, N. J., acorporation of New Jersey Application May 12, 1938, Serial N01 207,553

3 Claims.

This invention relates to hoists, and more particularly to a powerdriven hoist of the multidrum type in which the drums may be drivenselectively from a common driving shaft.

One object of the invention is to enable the hoist to be convenientlylengthened or shortened by the addition or removal of adrum or'drums andassociated driving and casing elements.

Another object is to avoid subjecting the driving elements of the hoist,to the strain of supporting the weight of'the drums and the load carriedby the drums.

Still another object is to assure adequate lubrication of the drivingelements of the hoist.

Other objects will be in part obvious and in partlpointed outhereinafter.

In the drawings accompanying this specificasupported by anti-frictionbearings 40 in the tion and in which similar reference numerals refer tosimilar parts,

Figure 1 is a longitudinal elevation, partly broken away, of amulti-drum hoist constructed in accordance with the practice of theinvention, and

Figure 2 is a transverse view taken'through Figure 1 on the line 2-2. 7

Referring more particularly to the drawings, designates a hoistcomprising a casing 2| to an end of which is secured, as by means'ofbolts 22, a motor 23 for driving a pair of drums 24 and 25 arrangedwithin the casing 2|.

The casing 2| is of the assembled type, and comprises barrel-likesections for each drum, in this instance two designated 25 and 21, andencircling the drums 24 and 25, respectively. At the extremities of thecasing sections'29 and 21 are introverted flanges 28 of which thoseat-the confronting ends of the casing sections distance piece 34 and theplate 32. The shaft 39 alsocarries a pinion 4| which meshes with a.

gear 42 keyed to the overhanging end of a drive shaft 43 which extendsaxially of the drums and is supported by bearings 44 and 45, arranged inthe outer surfaces of plates 32 and 3|, respectively,

On the end of the drive shaft carrying the gear 42 is a nut 46 whichseats against the gear to press it against the inner race of the bearing44, and on the opposite end of the drive shaft is a nut 41 which seatsagainst the inner race of the bearing 45 and assists in maintaining theshaft bearings securely in position and to avoid endwise movement of theshaft with respect to its bearings. A suitable cover 48 i: arranged overthe end of the shaft 43 to ex elude dirt from the bearing 45.

Each drum is provided with separate drivin I mechanism controllableindependently of other seat against and are secured, as by means ofbolts 29, to a plate extenjing transversely of the hoist.

Similarly, prates 3| and 32 serving; among otlvsrs, the functions ofcover plates and extend- 'ing transversely of the hoist, are arranged atthe outer ends of the casing sections 21 and 26, respectively. Theplates 3| and 32 are fastened to the casing by bolts 33, and the bolts33 associated with the plate 32 also secure in position a distance piece34 which overlies the plate 32 and supports the motor 23.

Any suitable motor, either electrically or pressure actuated, may beemployed for driving the hoist and the overhanging portion of its shaft35 is supported by an anti-friction'bearing 3B in the distance piece.

On the end of the shaft 35 is a pinion 3l driving mechanisms in theorganization and the shaft 43 is accordingly provided with a series ofpinions 49 which are in splined engagement with the shaft 43 and locatedadjacent corresponding ends of the drums, preferably at the ends remotefrom the motor 23. In the same transverse planes as the pinions 49 arecarriers 50 having integral sleeves 5| that fit into the bores 52 of thedrums to which they may be secured as by keys 53.

Each carrier is in the form of a box, comprising a pair of flanges 54and 55 of which the flange 54 is located on the end of the sleeve 5| andthe flange 55 is held in spaced relation with respec to the flange 54 bywebs 56. The flanges 54 "and 55 extend outwardly beyond the ends of thewebs 56 and carry stub shafts 51 upon which are arranged anti-frictionbearings 58 inserted in planetary gears 59 meshing with the pinions 49and with an internal gear 59 encircling the carriers.

To the end that neither the weight of the drums nor the load applied .tothem will be borne by the shaft a slight clearance 6| is providedbetween the sleeve 5| and the shaft and the weight of the drum issupported directly by the main frame, more particularly by thetransverse plates 39, 3| and 32. The drum 24 is accordingly providedwith an'anti-friction hearing 62 disposed about the end of the sleeve 5|and seated in a recess 63 in the plate 32, and in the flange 55 of thecarrier is an anti-friction bearing 64 which is disposed upon a boss 65of -able on the plate 3| and through which the shaft ll extends. Thedrum 2! is likewise provided with abearing i2disposedinarecessflintheplate 3|, and on the boss 85 of the plate ii isthe anti-friction bearing it carried by the flange ii of the carrierassociated with the drum ll.

with further reference to the internal gears, each gear 60 is held inassembled relationship with the planetary gears B! by webs 68 ofdiskshape mounted upon anti-friction bearings i1 and 68, arranged on thesleeve SI and the boss 85, respectively. The portion of the webs Itencircling the anti-friction bearings are in the form of flanges 69 uponwhich are arranged packing members II to effect a seal between the websand the adjacent elements.

The webs It are imperforate and seat with the outermost portion of theirinner surfaces against the side of the internal gear I to which they aresecured. in fluid tight relationship, by bolts II. Thus, the webscombine with the internal gear to define a chamber 12 for lubricantwhich may be introduced into the chamber I! through a hole 13 in theplate 3. and opening into the adjacent clearance space ii. Otherlubricant filling openings (not shown) may be provided wherever requiredto assure a plentiful supply of lubricant within the chamber I2 and inthe spaces communicating the lubricant chambers with the variousbearings located more remotely from the lubricant chambers, as forexample the drive shaft bearings and those arranged on the free ends ofthe sleeves 5|.

Suitable means are provided-to enable the internal gear of each drivingconnection to be held stationary whenever it is desired to causerotation of the drum. To this end a braking element II is disposed aboutthe internal gear" of which the periphery serves as a friction surfaceIi. The braking element II comprises the usual flexible band It carryinga lining ll to frictionally engage the surface IS. The brake band andits lining are split and on opposite sides of the gap ll thus formed arelugs 19 to one of which is pivotally connected a lever 80 and to theother a link 8i which is also pivotally connected to the lever 8|. 3

In order to prevent rotary movement of the brake band when contractedupon the surface I5 said band It is provided, on opposite sides of thegap ll, with lugs 82 to abut brackets 83 mounted .upon beams 84 carriedby the casing sections 28 and 21. The brackets 83 are adjust- I thebeams, being locked thereto by clamp plates 85 and screws 86 threadedinto the beams.

Suitable adjusting screws 81 are threaded through the brackets and seatupon the upper surface of the beams 84 for raising and lowering thebrackets as required to assure the correct degree of clearance betweenthe braking element and the surface 15. The screws 81 also serve asanchors for tension springs .8 connected to links 89 on the brake bandand on opposite sides of the gap 18.

The springs act constantly to expand the brake band so that, intheabsence of pressure against the lever ",the internal gear il will befree to rotate with the drive shaft from which motion is transmitted tothe internal gear by the planetary gears -59. However, when it isdesired to cause rotary movement of the drum the brake band iscontracted. by means of the lever 8|, to hold the internal gearstationary and the pinion ll will then cause the planetary gears 58 torotate along the internal gear, in a well understood manner, and causethe associated drum to rotate.

The levers ll of the several drums may be manipulated separately orsimultaneously in the same or in opposite directions to cause rotationof the drums in the ing in and paying out the cable ll wound upon thedrums.

In order that the drums may be conveniently held against spinning duringthe time that the associated driving element is rendered non-effectiveeach drum is provided with a braking flange II for cooperation with abrake shoe 02 mounted upona pivot ll seated in the casing sections. Thebrake shoe I! has a treadle ll against which the operator may step topress the brake shoe into frictional engagement with the brake flange8|. The brake shoe 92 is preferably pressed lightly against the flangeii at all times in-order to prevent spinning of the drums and to thisend is provided with a lug 0! against which acts a spring-pressed pawlIi mounted upon the pivot As will be readily apparent from the foregoingdescription, the drums are supported entirely by the main frame of thehoist and any load applied to them will be carried exclusively by themain frame rather than by the movable elements of the hoist.

A further highly desirable feature of the invention is that, owing tothe unique design of the hoist. each drum and its driving and easingelements may be assembled as a complete unit. Thus, if the work requiresonly a single drum the other drum or drums together with their drivingand easing elements may be removed and a drive shaft suitable forconnection with only one driving element be substituted for that shown.I

On the other hand if the work for which the hoist is intended be of sucha nature as to require three drums an additional unit may be attached tothe end of the casing section I! and a drive shaft suitable for drivingall the drums substituted for the shorter shaft. In adding a new unit tothe hoist a replica of the plate II is tubular extension, meanssubstituted for the plate ii and the latter plate is positioned toperform its usual functions as a closure for the end of the hoist and asa support for the drive shaft and the bearings ii and of the newlyattached unit.

We claim:

1. A hoist, comprising a main frame havin a plurality of transverseplates spaced with respect to each other, carriers within the main framehaving tubular extensions, a drum on each for securing each drum to eachtubular extension, bearings'in one transverse plate for one carrier andfor the tubular extension of another carrier. a bearing in anothertransverse plate for the tubularextension of said one carrier, a bearingin still another transverse plate for such'other carrier, a rotary driveshaft extending through the tubular extensions and the carriers, anddriving connections for transmitting motion from the drive larextension, hearings in shaft to the carriers. Y

2. A hoist, comprising a main frame having transverse plates, a carrierwithin the main frame between the transverse plates having a tubularextension, a drum on the tubular extension, means for securing the drumto the tubuthe transverse plates for .the carrier and the tubularextension, a rotary drive shaft extending through the tubular directionsrequired for reelextension and the carrier, a driving connection fortransmitting motion from the drive shaft to the carrier, and a fluidtight casing enclosing the driving connection and being supported by atransverse plate and the tubular member.

v3. A hoist, comprising a main frame having sion and the carrier, 9. sunpinion on the drive shaft,'an internal gear encircling the sun pinion,

a planetary gear on the carrier intermeshing with the sun pinion and theinternal gear, webs to support the internal gear and cooperatingtherewith to form a fluid tight enclosure for the gears and the pinion,hearings on a transverse plate'and the tubular'extension for the webs,and braking means cooperating with the m internal gear to control themovement, of the FRANCIS A. JIMERSON'. HAROLD c. REYNOLDS.

